• http://ir.lib.ruh.ac.lk/handle/iruor/19417
• http://ir.lib.ruh.ac.lk/handle/iruor/19418
• http://ir.lib.ruh.ac.lk/handle/iruor/19419
• http://ir.lib.ruh.ac.lk/handle/iruor/19420
• http://ir.lib.ruh.ac.lk/handle/iruor/19421
• http://ir.lib.ruh.ac.lk/handle/iruor/19422
• http://ir.lib.ruh.ac.lk/handle/iruor/19423
• http://ir.lib.ruh.ac.lk/handle/iruor/19424
• http://ir.lib.ruh.ac.lk/handle/iruor/19425
• http://ir.lib.ruh.ac.lk/handle/iruor/19426
• http://ir.lib.ruh.ac.lk/handle/iruor/19427
• http://ir.lib.ruh.ac.lk/handle/iruor/19428
• http://ir.lib.ruh.ac.lk/handle/iruor/19429
• http://ir.lib.ruh.ac.lk/handle/iruor/19430
• http://ir.lib.ruh.ac.lk/handle/iruor/19431